17681620044 has 48 divisors (see below), whose sum is σ = 46559761920. Its totient is φ = 5173304640.

The previous prime is 17681620043. The next prime is 17681620063. The reversal of 17681620044 is 44002618671.

It is a junction number, because it is equal to n+sod(n) for n = 17681619984 and 17681620011.

It is not an unprimeable number, because it can be changed into a prime (17681620043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2305684 + ... + 2313339.

It is an arithmetic number, because the mean of its divisors is an integer number (969995040).

Almost surely, 2^17681620044 is an apocalyptic number.

It is an amenable number.

17681620044 is an abundant number, since it is smaller than the sum of its proper divisors (28878141876).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17681620044 is a wasteful number, since it uses less digits than its factorization.

17681620044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4619070 (or 4619068 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 17681620044 in words is "seventeen billion, six hundred eighty-one million, six hundred twenty thousand, forty-four".